Q235B Q355B Prefabricated Steel Buildings Fast Construction Commercial Prefab Building
Product Details
| Steel Grade: | Q235B Q355B | Construction Speed: | Fast Prefab Construction |
|---|---|---|---|
| Column Spacing: | 6-9 M | Roof Panel: | Corrugated Steel Sheet |
| Surface Treatment: | Painted Anti-Corrosion | Application: | Commercial Prefab Building |
| Highlight |
Q355B Prefabricated Steel Buildings,Fast Construction Prefab Steel Building,Commercial Prefabricated Steel Construction |
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Product Description
Our prefabricated steel buildings combine factory precision with efficient on-site assembly. Steel columns, beams, end plates, and connection components are manufactured in advance, clearly labeled, and packed for export.
Designed primarily for bolted assembly, the system helps reduce on-site welding, construction waste, and labor-intensive fabrication. Optional insulated wall and roof panels, steel doors, and aluminum alloy windows allow the building to be configured for different project requirements.
Office buildings, schools, apartments, modular public facilities, and other commercial projects.
| Item | Specification |
|---|---|
| Product | Prefabricated Steel Structure Building |
| Main Frame | Steel columns and beams |
| Steel Grades | Q235B / Q355B |
| Connections | High-strength bolts and anchor bolts |
| Wall and Roof | Insulated sandwich panels (optional) |
| Doors and Windows | Steel doors and aluminum alloy windows (optional) |
| Surface Treatment | Shot blasting and anti-corrosion coating |
| Factory Prefabrication Rate | ≥85% |
| Target Tolerance | ±1-2 mm for designated dimensions |
| Assembly | Primarily bolted |
| Design Life | 50 years, subject to design and maintenance |
| Seismic Design | In accordance with applicable local codes |
Project-specific drawings, calculations, specifications, and installation documents are available according to the agreed scope of supply.
- Factory fabrication with controlled production and inspection processes
- Pre-drilled or prepared connection details according to approved drawings
- Clearly labeled components for easier overseas installation
- Reduced field welding and fewer on-site fabrication operations
- Efficient assembly using bolted steel connections
- Optional insulated wall and roof systems
- English installation manuals and technical support documentation
- Potential for dismantling and component reuse where technically feasible
Quality control is an important part of prefabricated steel structure manufacturing. Inspection requirements are established according to project drawings, technical specifications, and applicable standards.
Depending on the agreed scope of supply, quality control may cover the following areas:
- Material Verification: Checking material grades and relevant material documentation against project requirements.
- Dimensional Inspection: Measuring specified member dimensions, connection interfaces, and hole positions.
- Welding Inspection: Conducting visual inspection and any additional examinations required by the approved inspection plan.
- Connection Verification: Checking bolt-hole arrangements and connection details against approved drawings.
- Surface Protection Inspection: Verifying surface preparation and coating requirements in accordance with the specified corrosion protection system.
- Final Inspection: Reviewing component identification, inspection records, and packing information before shipment.
Inspection records and supporting documentation can be provided according to the project requirements and agreed scope of supply.
The applicable acceptance criteria, inspection methods, and tolerances are defined by the approved drawings, technical specifications, and relevant standards.

We supply clearly identified steel components with export packaging and English-language technical documentation. Component layouts, connection details, and installation instructions can be prepared in accordance with the approved project drawings.
Specifications and available configurations are confirmed during project engineering.

We specialize in prefabricated steel structure buildings and steel component manufacturing for overseas construction projects. Our manufacturing process covers steel cutting, drilling, welding, surface treatment, and component identification, with quality inspections carried out according to project specifications.
By using factory-prefabricated components and bolted connection systems, we help reduce on-site welding and simplify installation. We also provide technical drawings, component lists, and installation documentation to support project coordination and construction.
Our solutions are suitable for offices, schools, apartments, industrial buildings, and other steel structure projects, with designs and specifications tailored to project requirements.


Final specifications are subject to approved drawings, engineering calculations, project conditions, and applicable standards.
Product Highlights
Prefabricated steel buildings with Q235B/Q355B steel, 6-9m column spacing, and painted anti-corrosion surface. Factory-prefabricated components enable fast bolted assembly, reducing on-site welding. Includes optional insulated panels, steel doors, and windows for commercial projects.
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Please use our online inquiry contact form below if you have any questions, our team will get back to you as soon as possible.